/**
 * Copyright (c) 2016 DeepCortex GmbH <legal@eventql.io>
 * Authors:
 *   - Paul Asmuth <paul@eventql.io>
 *
 * This program is free software: you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License ("the license") as
 * published by the Free Software Foundation, either version 3 of the License,
 * or any later version.
 *
 * In accordance with Section 7(e) of the license, the licensing of the Program
 * under the license does not imply a trademark license. Therefore any rights,
 * title and interest in our trademarks remain entirely with us.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the license for more details.
 *
 * You can be released from the requirements of the license by purchasing a
 * commercial license. Buying such a license is mandatory as soon as you develop
 * commercial activities involving this program without disclosing the source
 * code of your own applications
 */
#include <eventql/util/VFS.h>
#include <eventql/util/io/mmappedfile.h>

RefPtr<VFSFile> WhitelistVFS::openFile(const String& filename) {
  auto iter = whitelist_.find(filename);
  if (iter == whitelist_.end()) {
    RAISEF(kIndexError, "file not found in VFS: $0", filename);
  }

  return RefPtr<VFSFile>(
      new MmappedFile(File::openFile(iter->second, File::O_READ)));
}

bool WhitelistVFS::exists(const String& filename) {
  return whitelist_.count(filename) > 0;
}

void WhitelistVFS::registerFile(
    const String vfs_path,
    const String& real_path) {
  whitelist_[vfs_path] = real_path;
}
